海河流域土壤有机碳储量及分布特征研究On the storage and distribution characteristics of soil organic carbon in Haihe basin
李发文;穆冬靖;李曼曼;
摘要(Abstract):
以海河流域为研究对象,在GIS技术支持下,根据流域的土壤类型图和土地利用类型图分析了海河流域土壤有机碳密度和碳储量及其空间分布特征。结果表明,海河流域土壤1 m厚度以内土体中土壤有机碳密度在1.6249.49 kg/m2,其中低于土壤平均有机碳密度的土壤有11种,所占面积比例为55%。海河流域土壤有机碳密度总体上空间分布差异较大,并且呈现由南向北逐渐增加的趋势。海河流域土壤有机碳储量约2 481.94 Tg,其中褐土有机碳储量最大,约为流域总量的1/3;潮土是分布最广的土类,也是流域最重要的农业耕作土类,蕴含着688.98 Tg的土壤有机碳储量。海河流域主要土地利用类型为耕地、林地及草地,所占面积比例约94%,各自的土壤有机碳密度均低于全国平均水平,而农业土壤潮土的大面积分布、成熟林和高覆盖度草地所占面积比例低是造成流域土壤有机碳储量水平低的主要原因。
关键词(KeyWords): 环境学;海河流域;土壤有机碳密度;土壤有机碳储量;土地利用类型
基金项目(Foundation): 水文水资源与水利工程科学国家重点实验室开放研究基金项目(2011490803);; 天津市应用基础及前沿技术研究计划青年基金项目(12JCQNJC05200);; 水利部公益性行业专项经费项目(201401041)
作者(Authors): 李发文;穆冬靖;李曼曼;
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